Automatic stop mechanism for sound-reproducing machines.



T. E. MYKINS.

AUTOMATIC STOP MECHANISM FOR SOUND REPRODUCING MACHINES.

. I I APPLICATION FILED JAN-20.1913. RENEWED AUG. 15,1916- Patented Oct. 17,1916.

2 SHEETS-SHEET I.

T. E. MYKINS.

AUTOMATIC-STOP. MECHANISM FOR souwo REPHODUCING MACHINES.

. APPLICATION FILED IAN-20.1913- RENEWED AUG- 1611916- 1,201,751. Patented 0ct.17,1916.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OF ICE- THOMAS E. MYKINS, or nocHE s'rEa. NEW YORK.

AUTOMATIC STOP MECHANISIVlI FOB SOUND-REPRODUCING MACHINES.

Specification of Letters Patent.

.Patented Oct. 1 7, 1916.

Application filed January 20, 1913, Serial No. 743,085 Renewed August 16, 1916.- Serial No. 115,330.

To all whom it may concern:

Be it known that I, Trronas E. MYKINS', of Rochester, in the county of Honroe and State of New York, have invented certain new and useful Improvements in Automatic Stop Mechanisms for Sound-Reproducing Machines; and I do hereby declare the. following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, forming a part of this specification, andto the reference-numerals marked thereon.

My invention relates to improvements in automatic stop mechanisms for sound reproducing machines, and more particularly to the class of machines which are characterized by a rotatable table on which is sup ported a flat record adapted to be engaged by a needle arranged on a swinging arm, and it has for one of its objects to provide a mechanism by which the parts may be set in advance so as to automatically stop the movement of the rotatable table at a predetermined point, either at the middle or any 'other part of the record, and to make the device also susceptible of adjustment so. as to 'stop the movement ofthe table at the end of records of different lengths.

A further object of my improvement consists in providing a construction, and arrangement of parts so that the desired adjustment may beinstantaneously made, and with little difliculty. v

A still further purpose of my invention resides in. providing a-simple-and inexpensive'mechanism that may be readily applied to any type of flat record sound reproducing machine. I

To these and other ends the lnventlon consists in certain improvements and com-.

binations of parts all as will be hereinafter more fully described, the novelfeatures being pointed out in the claims at the end of the specification.

In the drawings:

broken away, showing the brake mechanism in engagement with the table; Fig. is'a Figure 1 is a plan view of a flat record machine, with parts broken to show the applicat on of a preferred emvertical sectional view of the brake mechamotor as usual in this class of devices.

3 1s the swlnging arm which is pivotally mounted on the frame upon the post 1, held in position by the standard 5.

'The brake mechanism is preferably arranged in a housing 6 which is attached to the frame in any convenient manner, as by means of a lug 7, secured to the plate 8 by means of a screw 9. The brake consists of a milled head '10, which is preferably provided with an inserted portion 11 of resilient material for engagement with the edge of the table and is adjustably supported on the rod 12 whereby the brake mechanism may be readily adapted .to tables of different diameters. The rod 12 is slidably'mounted in the housing 6, and is actuated normally in the direction of the rotating table by means of the spring 13.

14 is a lever pivoted in the housing upon.

the set screw 15, the lower end of said lever being in engagement with the aforementioned rod 12, while the. upper end of the lever engages a rod 16 which is slidably ing; as appearing in Fig. 7,- and cooperates.

with the brake releasing device in a manner which will presently be made clear.

The brake releasing device is mounted on the swinging arm 3,'preferably in a manner to be adjustable, and in the present arrange,

ment, it includes a split ring 19, the adjacent ends of which are held together by means of a bolt 20 and nut 21. The ring 19 carries a downwardl extendin arm 22 u on which is arrangeda laterally disposed curved guide 23 which includes upper and lower'overhanging flanges 24. V

25 designates a recesswhich' extends longitudinally of the guide.

' relatively thereto with the swinging 'arm.'

26 is slidable member preferably in the s: slidable in theguide, being provided at one end with thefinger piece 27 and at its opposite end with the flange 28 arranged to engage one end of the guide so as to limit the inward movement of the slidable member. The member 26 is also provided with a recess or opening 29 which is adapted to receive the end-of the'rod 16 of the brake mechanism, when theswingin'g arm is moved to such a positionas to bring said recess into alinement with the said rod.

With th'isdescription of the construction, the operation will be readily apparent, and, briefly, is as follows: Normally. the brake mechanism is in the position shown in Fig. 6, the brake being engaged with the rotatable table. A record having been placed on the table, the arm is moved until the needle is'at thepoint where it is desired .to stop the move ment of thetable. During this preliminary adjustment of the arm, it will be noted that the rod 16 is engaged with the recess in-the slidable member 26, thereby holding said slidable member, while the guide 23 moves The finger piece 17 is then operated to disengage the brake from the table, which also causes the rod 16 to be withdrawn from engagement with the slidable member 26. The

swinging arm is then set at the beginning of the record,-the-sounds of which are reproduced until the arm has moved vfar enough to bring the recess of the member 26 into alinement with the rod 16, which then drops,

- in the recess and permits the brake to be forced against the table by the spring l3;

Itwill'be obvious that the invention is not limited to the exact details of construction herein set forth, but comprehends any ar rangement which maybe characterized by a brake mechanism adapted to be released by w a cooperating partthat can be laterally adjusted upon the swinging arm to any one of a series \ofdifferent positions, and preferably a slidable member arranged on a supporting guide. I claim as my invention:

1.1 In a machine for reproducing sound, the combination with a rotatable table, of. a swinging arm movable over the top of the table, a brake mechanism arranged to engage the table, and a brake releasing device ar-' ranged on the swinging arm for cooperation with the brake, said brake releaslng device embodying a slidable member adjustable 'ing with the brake.

laterally of the'swinging arm and cooperat- 2. In a machine for reproducing sound, the

combination with a rotatable table, of a swinging arm movable over the top of the table, a brake mechanism arranged to engage the table, and a brake releasing device arranged on the swinging arm for cotiperatlon with the brake, said brake releasing devlce embodying afguide, and a slidable memberarranged on the guideand cooperating with the brake.

3. In a machine for reproducing sound,

vguide and cooperating with the brake.

' 4. In a machine for reproducing sound,-

the combination with a rotatable table, of a swinging arm movable over the top of the -table,a brake mechanism arranged to en'- gage the table, and a brake releasing device arranged on the swinging arm for cooperation with the brake, said brake releasing device embodying a curved guide, and a curved slidable member arranged on the guide and provided with a recess; which cooperates with a portion of the brake mechanism to release the same.

5. Anautomatic stop having, in combina-v tion, an oscillating-member provided with a curved guide-waysubstantially concentric with its center of oscillation; a curved controlling-member supported in said uideway and retained frictionally against engi- Qtudinal movement therein, said controllingmember having a recess; a brake; a spring tending to throw the brake into operation;

and a second controlling-member connected with the'brake .andnormally seated against the surface. of the curved controlling-member, whereby the brake is held out of operation, said second controlling-member having an extremity adapted to enter said recess to .permit the brake to operate, and fitting the recess closely so as to retain the curved controlling-member against movement with the oscillating-member when the recess is so engaged.

6. An automatlc stop having, in combination," an oscillating-member provided with a guide plate arranged with itswidth ver-.

tical and curved concentrically wit the center of oscillation, the guide-plate beingprovided with upper. and lower marginal flanges; a sheet-metal cam-plate embraced by said flanges and held thereby in curved position, the cam-plate being provided with a recess; a brake; a controlling-member connected with sald brake and havr'ng an extremity. engaging the forwardmsurface of the cam-plate and adapted to enter the recess therein; and a spring tending to throw said extremity into said recess and to move said member in a direction. to throw the brake into operation;

. horizontal slot and upper and lower mar-- ginal rearWardIyTbent flanges; a cam-plate supported by the guide-plate and retained by said'flanges, the forward surface of the cam plate being accessible through said slot,

- and the cam-plate being provided with a recessya brake; a slide-rod carrying the 5 brake and having an end adapted to engage the forward surface of the cam-plate and to enter the recess therein; and a spring tending to throw said. extremity into said recess and tomove the slide-rod in a direc- 20 tion to thrdw the brake into operation.

THOMAS E. MYKINS.

Witnesses:

RUssELL B. GRIFFITH, H. E. STONEBRA'KER.-

copies ofv this patent may be obtained for five cents each, by addressing the "Commissioner of Patents- Washington, D. 0, 

